TABLE 2.
Torsion angles
| Nucleotide | χa | α | β | γ | δ | ε | ζ |
|---|---|---|---|---|---|---|---|
| aBackbone torsion angles: 5′→O3′-P−αO5′−βC5′−γC4′−δC3′−εO3′−ζP−O5′→3′. | |||||||
| bThe delta is the amount the values differs from A-form values (Gelbin et al. 1996). | |||||||
| cUnderlined values differ from A-form values by more than 36°. | |||||||
| 5′ closing pair | 200 ± 5 (Δ7)b | 299 ± 8 (Δ14) | 171 ± 4 (−Δ13) | 47 ± 4 (−Δ7) | 81 ± 1 (Δ0) | 213 ± 4 (−Δ1) | 293 ± 3 (Δ4) |
| G | 195 ± 7 (Δ2) | 291 ± 5 (Δ6) | 177 ± 3 (−Δ7) | 49 ± 4 (−Δ4) | 80 ± 2(−Δ2) | 224 ± 4 (Δ10) | 296 ± 4 (Δ7) |
| N | 196 ± 8 (Δ3) | 168 ± 5 (Δ117)c | 140 ± 8 (−Δ44) | 54 ± 5 (Δ1) | 87 ± 4 (Δ6) | 231 ± 6 (Δ17) | 282 ± 9 (−Δ11) |
| R | 210 ± 12 (Δ17) | 298 ± 6 (Δ13) | 152 ± 10 (−Δ32) | 64 ± 6 (Δ11) | 87 ± 3 (Δ6) | 206 ± 4 (−Δ8) | 291 ± 12 (−Δ6) |
| A | 219 ± 8 (Δ26) | 289 ± 9 (Δ4) | 173 ± 8 (−Δ11) | 52 ± 4 (−Δ1) | 87 ± 3 (Δ6) | 218 ± 3 (Δ4) | 296 ± 8 (−Δ1) |
| 3′ closing pair | 200 ± 5 (Δ7) | 139 ± 8 (Δ146) | 227 ± 11 (Δ43) | 188 ± 9 (Δ135) | 86 ± 3(Δ5) | 221 ± 6 (Δ7) | 298 ± 8 (Δ1) |
